natural world

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Across
  1. 3. a solid aggregate of minerals, forming the Earth's crust
  2. 7. a natural geological feature where water flows over a vertical drop in a river or stream
  3. 9. a depression between mountains
Down
  1. 1. the pointed top of a mountain
  2. 2. a massive river of ice flowing from land into the sea
  3. 4. a natural, continuous flow of surface water moving within a defined channel
  4. 5. a deep, narrow valley with steep sides
  5. 6. a natural underground hollow
  6. 8. a high, steep rock face, often vertical, found in geological settings like coasts